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Link: http://codepad.org/swe7NRct    [ raw code | fork ]

C, pasted on Apr 17:
static size_t _getline(char **lineptr, size_t *n, FILE *stream) {
    char *bufptr = NULL;
    char *p = bufptr;
    size_t size;
    int c;

    if (lineptr == NULL) {
        return -1;
    }
    if (stream == NULL) {
        return -1;
    }
    if (n == NULL) {
        return -1;
    }
    bufptr = *lineptr;
    size = *n;

    c = fgetc(stream);
    if (c == EOF) {
        return -1;
    }
    if (bufptr == NULL) {
        bufptr = (char*)malloc(128);
        if (bufptr == NULL) {
                return -1;
        }
        size = 128;
    }
    p = bufptr;
    while(c != EOF) {
        if ((p - bufptr) > (size - 1)) {
                size = size + 128;
                bufptr = (char*)realloc(bufptr, size);
                if (bufptr == NULL) {
                        return -1;
                }
        }
        *p++ = c;
        if (c == '\n') {
                break;
        }
        c = fgetc(stream);
    }

    *p++ = '\0';
    *lineptr = bufptr;
    *n = size;

    return p - bufptr - 1;
}

/* Emulation of FreeBSD's style of the implementation of streams */
char *__fgetln_int_buf = NULL;
/* Size of the allocated memory */
size_t __fgetln_int_len = 0;

static char *_fgetln(FILE *fp, size_t *lenp) {
    /* SKYNICK: Implementation note: "== -1" isn't equal to "< 0"... May be
     * getline(3) page will have more notes/examples in future... */
    if(((*lenp) = _getline (&__fgetln_int_buf, &__fgetln_int_len, fp)) == -1) {
        if (__fgetln_int_buf != NULL) {
            free(__fgetln_int_buf);
        }
        __fgetln_int_buf = NULL;
        __fgetln_int_len = 0;
        (*lenp) = 0;
    }
    return __fgetln_int_buf;
}


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